Journal
JOURNAL OF REINFORCED PLASTICS AND COMPOSITES
Volume 42, Issue 21-22, Pages 1176-1190Publisher
SAGE PUBLICATIONS LTD
DOI: 10.1177/07316844221147487
Keywords
Composite laminates; impact behavior; mechanical response; Finite element analysis
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The dynamic mechanical behaviors of [0(2)(degrees)/90(2)(degrees)](4s) fiber-reinforced composite laminates under double-position low-velocity impacts are investigated using the finite element method. The interference effect of impact damage is studied by impacting two positions symmetrically with different distances and energies. The results show that the maximum displacement is a suitable parameter for characterizing the degree of damage interference.
The dynamic mechanical behaviors of the [ 0(2)(degrees) / 90(2)(degrees) ] (4s) fiber-reinforced composite laminates subjected to double-position low-velocity impacts are investigated by finite element method. Two impact positions symmetrical about the center of the laminates are impacted sequentially with three impact distances (10 mm, 20 mm, and 40 mm) under three impact energies (5 J, 10 J, and 20 J) to study the interference effect of impact damage. For comparison, plastic damage model (PDM) and elastic damage model (EDM) are established to describe the intra-laminar constitutive, respectively. Compared with available experimental data, the mechanical responses calculated by PDM are more accurate, especially at high energies. Affected by the impact interference, the oscillation of force-time curve for the second impact rather than the first impact is relatively weaker, while the severity of impact damage is reversed. The results show that the maximum displacement is more suitable for characterizing the degree of damage interference than bending stiffness, peak force, and energy dissipation.
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